The role of cations in the biodegradation of wood by the brown rot fungi

Jellison, Jody; Connolly, Jon H.; Goodell, Barry; Doyle, B.S.; Illman, Barbara L.; Fekete, Frank A.; Ostrofsky, Andrea

doi:10.1016/s0964-8305(97)00018-8

Cited by 118 publications

(58 citation statements)

References 90 publications

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“…In contrast, brown-rot fungi do not secrete these enzymes. Instead, they oxidize lignin via a mechanism relying on hydroxyl radicals, which are generated via the Fenton reaction (Hatakka and Hammel 2011;Jellison et al 1997;Martinez et al 2005).…”

Section: Electronic Supplementary Materialsmentioning

confidence: 99%

Linking molecular deadwood-inhabiting fungal diversity and community dynamics to ecosystem functions and processes in Central European forests

et al. 2015

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Fungi play vital roles in the decomposition of deadwood due to their secretion of various enzymes that break down plant cell-wall complexes. The compositions of woodinhabiting fungal (WIF) communities change over the course of the decomposition process as the remaining mass of wood decreases and both abiotic and biotic conditions of the wood significantly change. It is currently not resolved which substrate-related factors govern these changes in WIF communities and whether such changes influence the deadwood decomposition rate. Here we report a study on fungal richness and community structure in deadwood of Norway spruce and European beech in temperate forest ecosystems using 454 pyrosequencing. Our aims were to disentangle the factors that correspond to WIF community composition and to investigate the links between fungal richness, taxonomically-resolved fungal identity, and microbial-mediated ecosystem functions and processes by analyzing physico-chemical wood properties, lignin-modifying enzyme activities and wood decomposition rates. Unlike fungal richness, we found significant differences in community structure between deadwood of different tree species. The composition of WIF communities was related to the physico-chemical properties of the deadwood substrates. Decomposition rates and the activities of ligninmodifying enzymes were controlled by the succession of the fungal communities and competition scenarios rather than fungal OTU richness. Our results provide further insights into links between fungal community structure and microbialmediated ecosystem functions and processes.

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Section: Electronic Supplementary Materialsmentioning

confidence: 99%

Linking molecular deadwood-inhabiting fungal diversity and community dynamics to ecosystem functions and processes in Central European forests

et al. 2015

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“…Similar results were also reported for glutaminase production (Prabhu and Chandrasekaran, 1996). These results can be attributed to the fact that the metals might be acting as cofactors for many enzymes involved in intermediatory metabolism (Jellison et al, 1997).…”

Section: Effect Of Metal Ionsmentioning

confidence: 99%

Optimised production of L-glutaminase: A tumour inhibitor from Aspergillus flavus cultured on agroindustrial residues

Nathiya¹,

Nath²,

Angayarkanni³

et al. 2011

Afr. J. Biotechnol.

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L-Glutaminase, an amidohydrolase enzyme has been a choice of interest in the treatment of lymphoblastic leukemia. This study investigates the production and optimization of extracellular glutaminase enzyme using several agro-industrial residues by Aspergillus flavus KUGF009 using SSF (solid state fermentation). Effect of process variables namely substrates, incubation period, temperature, moisture content, initial pH, supplementary carbon and nitrogen sources and metal ions on the production of L-glutaminase was studied and accordingly, optimum conditions were determined. A. flavus KUGF009 was cultured in tea dust to produce L-glutaminase. The organism produced high levels of glutaminase under optimized culture conditions on the 5th day of incubation at an optimum pH 4.0, temperature 30°C and moisture content 50% by SSF. Enhanced production occurred on the addition of dextrose, yeast extract and MgSO 4 as nutritional factors.

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“…Holocellulose content and viscosity were inversely related to the mass loss. The lower pH in more biodegraded samples can be associates with organic acid production by BRF during its metabolism 10 . The decreased viscosity is related to holocellulose depolymerization produced by brown rot fungi mainly in early stages of biodegradation 30 .…”

Section: Multivariate Analysismentioning

confidence: 99%

“…The total iron concentration in wood is usually lower than 2 μmol/g in non-degraded wood 10 , it can be hardly found as a free cation due to their limited solubility in a neutral pH environment, but is attached to the wood cellulose [11][12] forming oxyhydroxides 10 .…”

Section: Introductionmentioning

confidence: 99%

EFFECTS OF HUMIC AND OXALIC ACID IN WOOD BIODEGRADATION BY Gloeophyllum trabeum

Pozo¹,

Contreras²,

Freer³

et al. 2010

J. Chil. Chem. Soc.

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To degrade wood, brown rot fungi (BRF) have developed a mechanism based on low molar mass iron reducing compounds that promote Fenton reaction. These compounds, also solubilise Fe(III), in conjunction with oxalic acid, making it available for reaction. It have been postulated that the humic acids participates on wood biodegradation by BRF, acting in a similar way that the fungal compounds. In this work this effect and its interaction with oxalic acid were evaluated. The effect of humic acid and oxalic acid on the biodegradation of radiata pine chips by the BRF Gloeophyllum trabeum was evaluated using a two level factorial design. Absence or concentrations of 5 g/L and 0.05 M for humic acid and oxalic acid respectively, were evaluated; temperature (25°C) and initial pH (5.0) were kept constant. The responses were mass loss, holocellulose content and viscosity, measured after 30 days of biodegradation. The effects of the variables were determined using standardized coefficients of the polynomial equation, which were obtained through a multiple linear regression. All experiments were performed in quadruplicate and the obtained model was validated through an ANOVA test with a confidence interval of 95%. Oxalic acid was the factor that has a greater effect on these variables; it was able to extract metals from wood and to inhibit biodegradation when used without further treatment of humic acid. Humic acid impregnation increases the metal content in wood, but did not stimulate the wood biodegradation.

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The role of cations in the biodegradation of wood by the brown rot fungi

Cited by 118 publications

References 90 publications

Linking molecular deadwood-inhabiting fungal diversity and community dynamics to ecosystem functions and processes in Central European forests

Linking molecular deadwood-inhabiting fungal diversity and community dynamics to ecosystem functions and processes in Central European forests

Optimised production of L-glutaminase: A tumour inhibitor from Aspergillus flavus cultured on agroindustrial residues

EFFECTS OF HUMIC AND OXALIC ACID IN WOOD BIODEGRADATION BY Gloeophyllum trabeum

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